https://blog.keltia.net • This is a web feed, also known as an Atom feed. Subscribe by copying the URL from the address bar into your newsreader. Visit About Feeds to learn more and get started. It's free. Visit website Recent posts Updated on $DATE date cryptography UNIX, chats, Books, Photos, Rants, Cryptography and other stuff. Zola2026-02-28T00:00:00+00:00https://blog.keltia.net/tags/cryptography/atom.xml 2026-01-15T00:00:00+00:00 2026-02-28T00:00:00+00:00 Ollivier Robert https://blog.keltia.net/old-pencil-and-paper-cryptosystems/

As you may have seen from my site, I have long been interested in old pencil and paper cryptosystems, even before getting hooked on computers. Over the years, I have re-implemented a few of them in various languages: Old BASIC on my Sinclair QL like ages ago Like 15 years ago in Ruby Then in Go when I learned the language in 2016 And more recently in, what else, Rust …

2018-09-17T21:33:41+02:00 2018-09-17T21:33:41+02:00 Ollivier Robert https://blog.keltia.net/software/golang-api-wrapper-for-the-sslabs-api/

Preambule I have now completed my API Wrapper series with this new one for the SSLLabs API, currently at v3. It is the perfect complement to the Cryptcheck) API and the Mozilla Observatory one I published earlier. Welcome to the Golang API wrapper, now at version 0.10.0 (and using Semantic Versioning to ensure compatibility) and available on Github there…

2018-08-13T16:06:43+02:00 2018-08-13T16:06:43+02:00 Ollivier Robert https://blog.keltia.net/software/golang-api-wrapper-for-the-mozilla-observatory/

Preambule Like I did for the cryptcheck.fr API in the previous article), please welcome the API wrapper for the Mozilla Observatory API. The Mozilla Observatory is a site which include many tests for websites including TLS (SSLLabs & Cryptcheck) and HTTP-related ones (XSS protection, X-Frame, Content Security Policy and many others). My Golang API wrapper, now at version 1.0.0 (and using Semantic Versioning to ensure compatibility) is available on Github there…

2018-05-09T19:58:43+02:00 2018-05-09T19:58:43+02:00 Ollivier Robert https://blog.keltia.net/software/golang-api-wrapper-for-cryptcheck-dot-fr/

Preambule Many of you know the SSLLabs site. Built by Qualys, Inc., it enables anyone to test various TLS -related parameters for given website running on port 443 (the default for TLS). But did you know there is also the cryptcheck.fr one? Formerly known as Imirhil, it allow not only for https websites to be tested but also SMTP , IMAP , SSH and general TLS (using a different port like a few API do) ones. Both are integrated in the Mozilla Observatory which also include more tests such as HTTP headers and whether a given site is pre-loaded in browsers ( HSTS )…

2015-02-12T00:00:00+00:00 2026-01-25T00:00:00+00:00 Ollivier Robert https://blog.keltia.net/imitation-game/

This is a Followup on the previous article Just saw the Imitation Game yesterday night, in VOST  in Paris. Mild spoilers below, do not read if you intend to watch it :)…

2015-02-09T16:16:51+01:00 2015-02-09T16:16:51+01:00 Ollivier Robert https://blog.keltia.net/alan-turing-bletchley-park/

Alan Turing Everybody (maybe even the dog ) is speaking of the 2014 movie called “The Imitation Game” with Benjamin Cumberbatch starring as Alan Turing but how many really know him? For many people, Alan Turing is one of the fathers of the modern computer (along with John Von Neumann ) and rightfully so. What they need to know and what the movie is trying to do (I have yet to see it) is to show how influential he was. …